﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp1
{
    class SumUtils
    {
        public int Img(int a,int b) 
        {
           
            int sum = a + b;
            Console.WriteLine("相加后的结果是"+sum);
            return sum;
        }
        public double Img(double a,double b) 
        {
            
            double sum= sum = a + b;
            Console.WriteLine("相加后的结果是" + sum);
            return sum;
        }
        public string Img(string a, string b) 
        {
            string sum = sum = a + b;
            Console.WriteLine("相加后的结果是" + sum);
            return sum;
        }
        public int Img(int a) 
        {
            
            int sum = 0;
            for (int i = 1; i <= a; i++)
            {
                 sum = sum + i;
            }
            Console.WriteLine("相加后的结果是" + sum);
            return sum;
           
        }
    }
}
